SCMC Message Forum  
Go Back   SCMC Message Forum > SVT Platforms > 93 - 95 SVT Cobra Forum
User Name
Password

Register FAQ Members List SCMC Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread
Old 11-03-2002, 05:37 PM   #1
cobrapace94
Registered User
 
cobrapace94's Avatar
 
Join Date: Nov 2001
Location: Houston (Humble), Tx.
Posts: 1,119
Send a message via AIM to cobrapace94
Extender on Cobra, WOW!!

Got the extender on, after it was modified by Sam G for use on the Cobra. All I can say is WOW. Had the air fuel ratio at 12:0-1 and it felt good. Shifts are much stronger. Even got rubber in 3rd and started to get wheel hop @ 5k in 2nd. Just driving normal it felt stronger. I left my timing @ 14 degrees and only heard detonation 1 time, temp is a cool 55. Started to rain and shifting with any throttle gets wheel spin. So could not play with the air fuel ratio any, started to rain. I will try 12.5 & 13 when it is not raining.
There is a dyno day coming up Nov 23 at a new shop in Houston, RSI, and I think they give air fuel ratio on the dyno print out. I will try out 12.5 or 13 later on the dyno and maybe 13.5 ro 14, depending on the air fuel ratio. I am looking to get over 250 rwhp and 300 rwtq after new 65 mm TB & extender. Last dyno I got 248 & 295.
Worth the wait on Sam G for the Cobra mod, thanks Sam for the quick turn around a e-mails. Definatly worth the $175 I got it from on e-bay & 70 for the Cobra mod.
__________________



1994 Cobra Indy Pace Car Convertible # 591 of 1000
2001 Cobra, #2001 of 3384 verts, Black on White, Born on 6/01/01
cobrapace94 is offline   Reply With Quote
Old 11-03-2002, 10:47 PM   #2
Black Snake
Moderator
 
Black Snake's Avatar
 
Join Date: Jun 2001
Location: Lexington, SC
Posts: 275
I’m not real familiar with the Extender and how it operates. Just because you set it to “12:1” how do you know you are actually at 12:1? What does it adjust/control to make the changes? Be careful trying to squeeze every last bit out of your set-up. On the street 12-12.5 is probably were you want to be. An NA set-up is not as sensitive to air/fuel ratios as a forced induction motor, but lean is lean. Also remember you add about a half point on the street. So if you set-up for 13:1 on the dyno, you will actually be seeing 13.5:1 on the street.

You shouldn’t have much trouble seeing your goals. With minimal mods (headers, off-road X, cat back and 75mm MAF) I saw about 250hp/300tq.
__________________
Rob Maurer
93 Cobra: Vortech S-Trim, ARF 165’s, TFS Stage I cam, 42# injectors, Kirban AFPR, Pro-M 80, AFM Power Pipe, MSD 6BTM, MSD Blaster Coil, fuel pressure and boost gauges, 255 Walbro in-tank pump, T-Rex, 130 amp 3G alt, Fluidyne radiator, Mark VIII fan, 1 5/8" JBA unequal length shorties, Bassani off-road X-pipe and cat-back, Maximum Motorsports Caster Camber Plates, D&D tubular K-member & coil overs, Tokico Illumina shocks/struts, Global West LCAs, 3.73 gears, Pro-5.0 shifter, Winger letters

02 Corvette Z06: LG Pro Long Tubes, GHL Catback
Black Snake is offline   Reply With Quote
Old 11-03-2002, 10:58 PM   #3
cobrapace94
Registered User
 
cobrapace94's Avatar
 
Join Date: Nov 2001
Location: Houston (Humble), Tx.
Posts: 1,119
Send a message via AIM to cobrapace94
Well the extender fixes the tip in retard when shifting and removes the 93 mph timing retard on our 94\95 computers. The extender is a FRPP item and has pots for adfusting air fuel ratio and rev limiter. When setting the aif fuel ratio, there is a chart telling where the ratio is. It tells the computer to add more fuel. Not sure how accurate the air fuel ratio is from the chart, but is a reference point anyways. The extender also has more aggressive fuel curves and timing tables, more like the AL9 computers of the fox body cars. That is why I want to get a air fuel ratio when it is run on the dyno.

Mods I have now are FRPP headers, Bassaini X with cats, FlowMaster cat back, Pro M77 MAF meter, stock 60 mm TB, Crane Hi6 ignition, 3.73 gears & over 115k miles plus some other no hp producing mods. When I got 248 rwhp mods were the same with over 109k miles. I was less than 10 rwhp to the 96 - 01 Cobras that were at the dyno day, I was the only happy on there as the 01 Cobras only went 259-266. Guesss it is getting over the number 250/300.
__________________



1994 Cobra Indy Pace Car Convertible # 591 of 1000
2001 Cobra, #2001 of 3384 verts, Black on White, Born on 6/01/01
cobrapace94 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 07:01 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © 1999-2017 SCMC, Inc